Electric heater.



EDWARD H. ABBOTT, OF os NGELEs, CALIFORNIA.

ELECTRIC HEATER.

No. eeo, 179;

' Specification of Letters Batent.

Patented m 16,1907.

Application filed December 19,1905. Serial No- 292,472.

To all whom it may concern:

Be it known that I,- ED ARD HfABBoT'r, a. citizen of the United-States, residing at. Los Angeles, in the county of Los Angelesiiiid State of California, have invented new and useful Improvenients in- Electric Heaters, oi which the following is a. specification.

It is the object ofmy invention to proyide a co npac t, cheap and efficient heater ofsimple construc- --tion.and1of great ,efliciency. I I accomplish these objects' .by. the heaterclescribed herein-and illustrated in the occompanying drawings in which A, Figure 1i s,-s' IOiigltiiCiiiliti verticel section on the line 11 of- Fig. 2.1 Fig. 2-is a cross section onthe line 2 2 oi Fig. 1.- 7

. 1n the drawings the-outer casing 31'is prefemblya.

hollow drum of sheet metal having small apertures or ports 4 near the top and bottom thereof. The heads '5 of the drum are held together by a. bolt 6. Extending from one head tothe other of the drum are hollon l sheet metal tubes 7 of which there may be as many as desired. I have ipn nd six to be a practical number for a small sized heater. These tubes register with openings in the head so'tha-t the air may pess through vto insulate wire 9 frorn the tube. This wire is coiled spirally e d m all be'connected together inseries, or-those on each side my be connected in series as 7 shown .in' Fig. 2, those on the right-hand being can nect ed by wire 10 withjhefeed 1wire 11 which is con nectedto source of electric energy, not shown, and those on the left hand being connectedby wire'12 "with the feed 'wirc. .On wire 10 is-a. switch 13' and on wire 12 is a switch 14 and by. opening the switches interposed in the circuit.

- drum is provided with supporting legs 18 so as to keep the heater elevated above thcfloor 19 so that the air may circulate freely through ihc tubes and around the drum and'to prevent any injury to the floor from the heat generated. The size of thcdrum and of the tubes closenessof the coils thereof are regulated by the capacity "of the heater.

By this construction I have provided a compact, cheap and efiicient heater. As soon as the tubes 7 are heated at current of air iscausod to flow through them I very rapidly. Air-is also drawn in at the ports at the g-bOttOIil of the drum and discharged ntthc ports at the top thereof, whereby great heating capacity is obtained. I i

Having described my-invcntion ,Whntl claim as new and desire to. secure by Letters Patent is:--

-1. An electric heater composed of a hoilow'metal drum, theinn'er faces of theends otsaid drum being lined with a heat resisting material, end having 'ii'plurnlity of nir'inlcts at the bottom thereof and a plurality of heat outlets at the top thereof a. plurality of metal tu covered with a heat resisting and insulating material .cxtonding from one end of the drug: to the other and opening through the ends, each of saild 'tubes being 'wound with arr-sistance coil. said coils being connected together in series and a switch 2. An electric heater composed of a hollow xnetai druln, the innerifi'ces .oi. the endsoi said drum being lined with a heat resisting material, and having beat outlets in its side; a'plnrality of metal tubes covered with n heat resist ing and insulating material extending from one end oi the the tubes being'connected-together in scrics'io a source of electrical energy; and, switches interposed in'thc circuits.

In witness that I claim theforegoing l have hereunto subscribed my naine this 13th day of December, 1905.

EDWARD n. ABBOTT.

Witnesses G. E. HARrruil, HENRY T. HAZARD.

'7 extending therethrough, the sl de of the wire and the 

